- the third letter of the Greek alphabet (Γ, γ)
- the third of a group or series
- a microgram
- a number indicating the degree of contrast between the darkest and lightest parts of a photographic image
- a unit of magnetic field intensity equal to 10
Origin of gammaMiddle English ; from Classical Greek ; from Semitic as in Classical Hebrew (language) gimel, akin to gamal, camel
- The third letter of the Greek alphabet. See Table at alphabet.
- The third item in a series or system of classification.
- A unit of magnetic intensity equal to one hundred thousandth (10−5) of an oersted.
- A unit of mass equal to one millionth (10−6) of a gram.
- Being in the third position relative to a designated carbon atom in an organic molecule at which an atom or a group may be substituted.
- Referring to the third of a group of isomers, or molecules of similar origin or properties, determined arbitrarily by those who discover or classify them. Used in combination.
Origin of gammaMiddle English, from Greek, of Phoenician origin; see gml2 in Semitic roots.
From Ancient Greek γάμμα (gamma).
gamma - Computer Definition
The way brightness is distributed across the intensity spectrum by a monitor, printer or scanner. Depending on the device, the gamma may have a significant effect on the way colors are perceived. Gamma is technically the relationship between the input voltage and resulting intensity of the output. A perfect linear device would have a gamma of 1.0 and be plotted on a graph called a "tone curve" as a straight line. Although a scanner is fairly linear, the tone curve of a monitor or printer is bent, yielding a gamma in the range of 1.8 to 2.6, which effects midrange tones. See gamma correction.
gamma - Investment & Finance Definition
A measure of how quickly an option’s delta will change. Delta measures the change in the price of a call option when the underlying futures asset price changes. Gamma is a mathematical formula that is used in pricing options.